Wireless sensor network data collection method applied to real-time monitoring

Abstract

The invention relates to a wireless sensor network data collection method applied to real-time monitoring, which comprises two processes of routing building and data transmission. In the router building process, a common coding mode is adopted, the data packet is subjected to cyclic redundancy check and then multipath routing meeting the requirements is built according to the load, link channel quality, hop number and other indexes; and in the data transmission process, a common coding mode or an enhanced type coding mode can be adopted, when the wireless channel conditions are poor, the enhanced type coding mode is adopted, that is, the data packet is subjected to segmentation, cyclic redundancy check, channel coding and bit interleave, whether the routing is switched is judged according to the current load of a father node in a routing list at the same time, when data packet is retransmitted, a physical layer, a data link layer and a routing layer are needed to be combined, multipath routing of the neighbor node of the father node is started for coordinated transmission, and a receiving node adopts a data packet receiving pooling technique. The wireless sensor network data collection method has the advantages of high routing building speed, low routing maintaining expense, high data transmission reliability and low time delay.

Description

technical field [0001] The invention belongs to the field of wireless sensor networks, and relates to a multi-hop wireless sensor network routing establishment and data transmission method, which can be used for real-time monitoring wireless sensor networks. Background technique [0002] With the development of microprocessor technology and wireless communication technology, wireless sensor networks will be applied to more and more fields, such as traffic control, environmental monitoring and automatic meter reading. Due to the great application value of the wireless sensor network, it has attracted great attention from the industrial and academic circles at home and abroad. Most of the previous studies on wireless sensor networks focused on the data link layer and network layer, but less research on the joint design of physical layer, data link layer and network layer. [0003] The main function of the wireless sensor network is to transmit the data information collected b...

AI Technical Summary

Problems solved by technology

There are usually two reasons that cause serious packet loss. On the one hand, some nodes have redundant loads, resulting in buffer queue overflow and packet loss; on the other hand, due to the time-varying nature of wireless communication links, when in deep fading, easy to cause packet loss

In order to ensure the reliability of data transmission, backoff retransmission and power control methods are commonly used at present. These are passive remedial methods, and the backoff retransmission method can only alleviate the congestion of wireless sensor networks and improve the efficiency of data transmission. Reliability, but retransmission brings a large data transmission delay

The method of power control can increase the transmission power of the sensor node and improve the reliability of data transmission for the communication link with poor wireless channel quality, but it wastes extra energy consumption and brings a negative impact on the transmission of other wireless sensor nodes. A stronger disturbance is coming

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